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Deadlock Prevention
One of the easiest approaches for avoiding a deadlock would be to obtain all the locks at the begin of the transaction. Though, this approach restricts concurrency very much, also you may lock some of the items that are not updated by that transaction (the transaction may contain if conditions).Therefore, better prevention algorithm have been evolved to stop a deadlock having the basic logic: not to permit circular wait to occur. This approach rolls back some of the transactions instead of letting them wait.
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
The primary key is selected from the
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
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In the architecture of a database system which external level used? In the architecture of a database system view external level used.
explain participation constraints with examples
Develop C# schoolproject ASAP Helping me with schoolproject. The project is prepared in C# and haves a database connection. We have some small issues asking up data from t
What is horizontal fragmentation? Horizontal fragmentation divides the relation by assuming every tuple of r to one or more fragments
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